A salp is a barrel-shaped, free-floating tunicate. It moves by contracting, thus pumping water through its gelatinous body. The salp strains the pumped water and feeds on phytoplankton. Distribution Salps are common in equatorial seas, where they float on their faces, alone or in long, stringy colonies. The most abundant concentrations of salps are in the Southern Ocean. Here they sometimes form enormous swarms, often in deep water, and are sometimes even more abundant than krill. In the last c… (More on Salp)